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Analog Devices Inc./Maxim Integrated MAX6307UK45D1-T
- Part No.:
- MAX6307UK45D1-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX6307UK45D1-T.pdf
- Description:
- IC SUPERVISOR 2 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,345
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Product details
Overview
The MAX6307UK45D1-T from Maxim Integrated is a 5-pin SOT23 programmable supervisory IC that monitors VCC (factory-set at 4.5V ±2.5%), an adjustable undervoltage input (RST IN), and an adjustable overvoltage input (OVRST IN) to assert a push/pull active-low RESET output. It features 8µA supply current, guaranteed RESET validity down to VCC = 1V, and a factory-programmed 1ms minimum reset timeout period. It is used in multivoltage embedded systems requiring robust power-up sequencing and brownout protection.
For engineers reviewing the MAX6307UK45D1-T datasheet, MAX6307UK45D1-T pinout, MAX6307UK45D1-T application, or MAX6307UK45D1-T equivalent, this page delivers verified technical context, exact pin functions, real-world application mappings, and validated alternative options - all grounded in Maxim's official documentation for the MAX6307UK45D1-T variant.
Technical Context
The MAX6307UK45D1-T implements a triple-monitor architecture: internal factory-trimmed resistor divider sets VCC reset threshold at 4.5V (±2.5% over -0°C to +70°C), while external resistor dividers program RST IN (undervoltage) and OVRST IN (overvoltage) thresholds referenced to a 1.23V internal bandgap. Its push/pull RESET output sinks ≥3.2mA at VCC > 4.25V and sources ≥800µA, eliminating need for external pull-up.
It uses a precision internal timer to enforce a guaranteed minimum 1ms reset timeout after all monitored supplies return to regulation. Immunity to fast transients is achieved via internal filtering and design tolerance to negative-going VCC glitches up to 100µs at 10mV overdrive - confirmed across temperature and voltage ranges per Typical Operating Characteristics graphs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Reset Threshold | 4.5V ±2.5% (factory-trimmed); ensures reliable reset assertion when main supply drops below 4.39V at +25°C, or 4.32V over full 0°C–70°C range |
| Supply Current | 8µA typical at +25°C; enables battery-powered operation with negligible quiescent drain |
| Reset Timeout Period | 1ms minimum (D1 suffix); guarantees system initialization hold time sufficient for most microcontrollers' internal clock stabilization |
| RESET Output Type | Push/pull active-low; drives logic-low directly without external pull-up, supports ≥3.2mA sink at VCC > 4.25V |
| Operating Temperature | 0°C to +70°C; qualified for commercial-grade embedded control and portable computing applications |
| VCC Validity Range | 1.0V to 5.5V; RESET remains asserted and valid down to VCC = 1V, enabling early-fail detection before µP core activation |
| RST IN / OVRST IN Threshold | 1.23V ±30mV reference; allows precise external programming of secondary supply monitoring points using resistor dividers |
Pinout & Package
MAX6307UK45D1-T is housed in a 5-pin SOT23 package (outline U5+1, land pattern 90-0174), measuring 2.9mm × 1.6mm × 1.1mm, RoHS-compliant with lead-free termination (-T suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push/pull reset output | Drives µP reset pin low during fault; no external pull-up required; sinks ≥3.2mA at VCC > 4.25V |
| 2 - GND | System ground reference | Return path for all internal comparators and output stage; must be low-impedance connection to PCB ground plane |
| 3 - RST IN | Adjustable undervoltage reset input | Monitors secondary supply (e.g., 3.3V rail); asserts reset when input falls below programmed threshold via external divider |
| 4 - OVRST IN | Adjustable overvoltage reset input | Monitors same or different supply for overvoltage faults; asserts reset when input exceeds programmed threshold |
| 5 - VCC | Main supply input & primary monitor | Powers device and feeds internal 4.5V threshold comparator; also serves as reference for MR and RST IN/OVRST IN biasing |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent monitoring | Simultaneously supervises VCC (4.5V), RST IN (user-defined undervoltage), and OVRST IN (user-defined overvoltage) - no shared threshold limitations |
| Factory-programmed timing | 1ms minimum reset timeout (D1) eliminates external timing components and layout variability |
| Transient immunity | Guaranteed immunity to VCC glitches ≤100µs at 10mV overdrive; prevents spurious resets in noisy power environments |
| No external components required | Operates fully functional with only VCC, GND, and monitored supplies - no capacitors, resistors, or pull-ups needed for basic operation |
| Valid RESET down to 1V VCC | Ensures deterministic reset assertion even during deep brownout, before µP internal regulators fail |
Applications
| Industrial PLC I/O Modules | Medical Portable Monitors |
|---|---|
Use Scenario: Power sequencing and fault detection in DIN-rail mounted I/O modules with dual 24V/5V rails and isolated sensor inputs. IC Role / Device Role / Timing Role: Primary VCC supervisor for 5V logic rail, plus RST IN monitoring isolated 24V field power and OVRST IN guarding against 24V surge events. Use Value: Prevents firmware corruption during 24V transients by asserting RESET within 100ns of overvoltage detection, synchronized with 1ms timeout ensuring clean µP restart. |
Use Scenario: Battery-backed vital signs monitor with 3.3V MCU, 5V display driver, and analog front-end powered from switched DC-DC converters. IC Role / Device Role / Timing Role: Monitors 5V display rail (VCC = 4.5V threshold), 3.3V MCU rail via RST IN, and battery charger overvoltage via OVRST IN. Use Value: 8µA quiescent current extends battery life; triple monitoring eliminates need for three discrete supervisors, reducing BOM count and PCB area by 60%. |
| Automotive Infotainment Head Units | Networking Edge Routers |
Use Scenario: Cold-cranking and load-dump resilience in 12V-powered head units with 5V/3.3V/1.8V internal rails. IC Role / Device Role / Timing Role: VCC monitors 5V domain, RST IN tracks 3.3V SoC supply, OVRST IN detects alternator overvoltage spikes on 12V input. Use Value: Immunity to 100µs load-dump transients avoids false resets during engine start; push/pull RESET drives automotive-grade µP with no external components. |
Use Scenario: High-availability edge router with redundant 5V power supplies and FPGA configuration integrity requirements. IC Role / Device Role / Timing Role: Supervises primary 5V rail (VCC), backup 5V rail via RST IN, and PoE injector overvoltage via OVRST IN. Use Value: 1ms timeout aligns with FPGA configuration clock startup; guaranteed RESET validity to 1V prevents partial configuration lockup during brownout recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6307UK45D2-T | Same 4.5V VCC threshold and pinout, but 20ms minimum reset timeout (D2) | Requires longer reset hold time - suitable for systems with slower clock stabilization or external memory initialization | Select when µP or peripheral startup exceeds 1ms; retains identical monitoring capability and package |
| TLV803EB29DBZR | Single-supply 2.93V reset IC in SOT23-5; no RST IN/OVRST IN inputs; 35µA supply current; 200ms timeout | Lacks dual-input monitoring - only replaces basic VCC supervision, not triple-rail fault coverage | Use only if application requires only single-rail monitoring and can accept higher current and fixed timeout |
Compared with MAX6307UK45D1-T, the D2 variant offers extended timing headroom without changing monitoring scope, while TLV803EB29DBZR reduces functionality to basic reset generation - making it a fallback only when triple-input supervision is unnecessary.
Availability
MAX6307UK45D1-T is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive infotainment systems, and networking edge equipment requiring stable component supply across commercial temperature grades.
Supply support for MAX6307UK45D1-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications, with emphasis on high-reliability embedded systems.
The MAX6305–MAX6313 family was engineered specifically for multivoltage microprocessor supervision in space-constrained, low-power systems - delivering triple-input monitoring, factory-programmed thresholds, and transient-immune reset generation in SOT23-5.
FAQ
What is the exact factory-set VCC reset threshold for MAX6307UK45D1-T?
The MAX6307UK45D1-T has a factory-trimmed VCC reset threshold of 4.5V, with tolerance of ±2.5% over the 0°C to +70°C operating range. At +25°C, the typical value is 4.500V, and the guaranteed min/max values are 4.388V and 4.613V respectively - per Table 1 and Electrical Characteristics section of the datasheet.
Does MAX6307UK45D1-T support manual reset functionality?
No, the MAX6307UK45D1-T does not include a manual reset (MR) input. Per the Selector Table and Pin Description, MR is present only on MAX6306/MAX6309/MAX6312 variants. The MAX6307UK45D1-T provides RST IN and OVRST IN for external supply monitoring but lacks dedicated MR pin functionality.
What is the maximum VCC voltage the MAX6307UK45D1-T can tolerate?
The MAX6307UK45D1-T has an absolute maximum VCC rating of +6V, but its functional operating range is specified as VCC = (VTH + 2.5%) to +5.5V. Since VTH = 4.5V, the minimum functional VCC is 4.613V - meaning the device operates correctly from 4.613V to 5.5V. Operation below 4.613V may not guarantee reset assertion.
Can MAX6307UK45D1-T monitor a 3.3V supply directly on VCC?
No - the MAX6307UK45D1-T's VCC pin is factory-configured to monitor a 4.5V nominal supply. To supervise a 3.3V rail, use the RST IN pin with an external resistor divider that scales the 3.3V signal to fall below 1.23V when the rail drops below the desired threshold (e.g., 3.0V). The VCC pin itself must be connected to a supply ≥4.613V for proper operation.
Is MAX6307UK45D1-T pin-compatible with other MAX630x devices in SOT23-5?
Yes, all MAX6305–MAX6313 devices share identical SOT23-5 pinouts per the Pin Configurations diagram. However, pin functions differ across variants: MAX6307UK45D1-T uses pins 3 and 4 for RST IN and OVRST IN, whereas MAX6306 uses pin 3 for MR and pin 4 is unused. Physical compatibility exists, but electrical function mapping must be verified per part number.
MAX6307UK45D1-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 2
- Voltage - Threshold:
- 4.5V, Adj
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 1ms Minimum
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX6307UK45D1-T FAQ
1.How can I place an order for MAX6307UK45D1-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6307UK45D1-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6307UK45D1-T reliable?
The price and inventory of MAX6307UK45D1-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6307UK45D1-T is usually 5 days.
3.What payment methods are accepted for MAX6307UK45D1-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6307UK45D1-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6307UK45D1-T?
MAX6307UK45D1-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6307UK45D1-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6307UK45D1-T?
For technical support, including MAX6307UK45D1-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6307UK45D1-T requirements.
6.How does Aetrix verify that MAX6307UK45D1-T is sourced from the original manufacturer or authorized distributors?
All MAX6307UK45D1-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6307UK45D1-T meets industry standards.
7.What is the process for return or replacement of MAX6307UK45D1-T?
All MAX6307UK45D1-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6307UK45D1-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6307UK45D1-T part is unused and in its original packaging.
Return procedure for MAX6307UK45D1-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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